Shiva Purana

siva.sh/siva-purana/saturda-samhita/36/2

बृहस्पतेर्महाबुद्धेर्देवर्षेरंशतो मुने ।। भरद्वाजात्समुत्पन्नो द्रोणोऽयोनिज आत्मवान् ।। २ ।।

sanskrit

O sage, though a part of the celestial sage of great intellect Bṛhaspati, the self-possessed and prudent Droṇa was born of Bharadvāja but not of any womb.

english translation

bRhaspatermahAbuddherdevarSeraMzato mune || bharadvAjAtsamutpanno droNo'yonija AtmavAn || 2 ||

hk transliteration by Sanscript